Angular paper box



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D. S. CLARK.

ANGULAR PAPER BOX. No. 413,029. f/ Patented 00%?1289.

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(ModeL) '2 Sheets-Sheet 2.

D. S. CLARK.

ANGULAR PAPER BOX.

No. 413,029. Patented Oct. 15, 1889..

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DWIGHT S. CLARK, OF CAMBRIDGE, ASSIGNOR TO EMMA L..,FORBES, OF

' BOSTON, MASSACHUSETTS.

ANGULAR PAPER BOX.

SPECIFICATION forming part of Letters Patent No. 413,029, dated October15, 1889.

Application filed August 6, 1889. Serial No. 3l9,882. (Modeh) To aZZwhom it may concern:

Be it known that I, DWIGHT S. CLARK, a citizen of the United States, andaresident of Cambridge, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inAngular Paper Boxes, of which the following is a specification.

Myinvention relates to that class of folded paper or card-board boxeswhich are used for packing finely-divided substances-such as starch,oatmeal, and other foods in powderand its object is to furnish a boxwhich may be well and conveniently closed.

In Figure 1 a part of the blank designed for my box is shown, the dottedlines indicating those lines which are simply scored'or indented in theusual way and not cut through. Figs. 2, 4, 7, 10, and 11 show in sideelevation the progressive steps in closing the end of the box. Figs. 3,5, and 8 are front elevations of certain of these positions. Figs. 6, 9,and 12 show three of them in plan.

In Fig. 1, A, B, O, and D are designed to form the sides of the box.These sides are separated from each other and form the end flaps byscored or indented lines, and the past ing-strip p is used to unite withpaste the two sides 0 and D in a manner well understood, so as to form afour-sided tube. This tube is shown in side elevation in Fig. 2 and fromthe front in Fig. 3. The end of the box is closed by the flaps (1, 19,c, and d, of which 01 is a full flap capable of covering the whole ofthe end, I) is a half-flap, while from a and c three-eighths of each areremoved and fiveeighths left. The two flaps last named are each dividedby scored or indented lines into three triangular fields, numbered 1, 2,and 3. The fronthalf-fiap bis differentlyscored,being divided into afour-sided figure in the middle and two rightangled triangles 4 4,correspon ding in size and position to identical triangles 3 3 in flapsa and c. In closing the ends of this box from the positions shown inFigs. 2 and 3 the first act is to force inward the points indicated by00, carrying the two triangles marked. 3 and the two marked 4 inside thebox and giving rise to the changes indicated by the side'and frontelevations presented in Figs. 4 and 5 and the views from aboverepresented in Fig. 6. The two flaps b and d can now be inclined towardeach other; or, to state it differently, if the front half-flap b ispressed inward it will have the eifect of closing the two triangularfields 3 and 4 on each side thereof upon each other, causing the pointsy y to approach, and the triangular fields 2 2 to lie down, and thelarge back flap d to come forward and take an inclined position, thecondition of things being clearly represented in the side and frontviews shown in Figs. 7 and 8 and in the plan, Fig. 9. A further pressureon (1 will at once give to the end the appearance seen in the sideelevation, Fig. 10, and then close it altogether, as in Figs. 11 and 12.V

Fig. 13 is a modified form of blank, difiering from that shown in Fig. 1only by the omission of the scored lines y r and y s. In this case theseveral steps selected to explain the process of closing are shown inside elevation in Figs. 14, 16, 19, 21, and 24:, and in front elevationin Figs. 17,20, 22, and 25, and in plan in Figs. 15, 18, 23, and 26. Thefolding .of this modification of my box is then as follows: The strip 10is first pasted on the inner surface of D, giving the open quadrilateraltube shown in side elevation in Fig. 14 and in plan in Fig. 15. Thefields of the side flaps a and 0 (now marked 5 in Fig. 13) are nextinclined toward each other, which causes the back flap d to inclineinward and the front flap 1? to incline in the same direction th'at is,to fall out from the body of the box-as is shown in the views, Fig. 16from the side, Fig. 17 from the front, and Fig. 18 from above. When thefull flap cl is further depressed, the fields 5 5 descend also and drawback the front flap b. This change is illustrated by Figs. 19 and 20.The next step consists in pressing the flap 5 back until it passes underthe large descending flap d, and takes for a moment in passing theposition shown in Fig.

21 a side elevation, Fig. 22 a front elevation, 5

and Fig. 23 a plan view, of the nearly-closed box. Fig. 24 is theposition reached just before the flaps all lie fiat, which final stateof things is seen in front elevation in Fig. 25

and in plan in Fig. 26.

The differences in the closed end resulting from the blank representedin Fig. 1 and that from the blank marked 13 are chiefly to be found inthe formation of two little Wings, each consisting of the triangularfields 3 and 4, face to face and extending downward. By the materialpacked in the box or otherwise these Wings may be thrust up flat againstthe end and toward the front B or not, as de sired; but in the case ofthe box from the blank shown in Fig. 13 the fact that the lines y r andy s are not scored and that the whole field 5 is stiff in consequencecauses the folds which correspond to the wings aforesaid to remainalways thrust up and flat, reaching to the front side B and in contactwith the end. This in many cases may be regarded as an advantage; butthe box is not folded as easily as when the blank in Fig. 1 is used, noris the surface formed by the closed flaps, upon which the large backfiap d lies, quite as fiat as it is when the middle four-sided figure inZ) and the fields 2 2 come edge to edge. As a consequence the pasting upshould be carefully done. It will frequently be found convenient toconstruct one end of the box so as to close in the manner provided forin Fig. 1 and the other end as in Fig. 13, the former to be pasted upfirst and the latter after the material which is to fill the package isin place.

By the expression a full or full-sized flap used in this specification,a flap is meant the width of which is equal to the width of that side ofthe box to which it is attached and the'height or length of which isequal to the least width of the box itself.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1S

1. A blank for an angular paper box, scored I 4 or indented forfolding,'so as to form the sides A, B, O, and D, and the pasting-stripp, the

full back flap cl, the half front flap b, subdivided to form 'a'trapezoidal figure, and two triangles 4 4 at the ends thereof, with twoside flaps, each subdivided to form the triangular fields 1, 2, and 3,substantially as described.

2. A blank for an angular paper box, scored or indented for folding toform the sides A, B, (J, and D, and the pasting-strip 13, all connectedtogether, and the four flaps a, 5,0, and d, to form the end, allconnected together and to the sides, of which oneis a full flap, one ahalf-flap provided with two triangular fields at its sides, as shown,and two five-eighths flaps placed alternately and subdivided into threetriangles, as set forth, substantially as described.

3. An angular paper box consisting of the sides A, B, C, and D, unitedto form a foursided prism. and closed by ends constructed each of theside flaps a and c folded in part upon themselves and in part againsttwo equal folds of the front flap, of the remainder of said front flap,and of a large back flap covering the whole end of the box and all theflaps below it, substantially as described.

4. An angular paper box consisting of the sides A, B, C, and D, unitedto form a foursided prism and closed by ends composedof, first, theadjacent triangular fields 2 and 3 of each of the side flaps in contact,respectively, with the triangular fields 1 1 of the same flaps and 4 4of the front flap, with the remainder of the front flap laid flat uponthe fields 4 4, and the folded side flaps, a full sized back flapcovering the whole ,and joined to fields 1 1 of said side flaps,substantially as described.

DWIGHT s. CLARK.

Witnesses:

WILLIAM C. WENDTE, SELWYN Z. BOWMAN.

